JP2011141059A - Circulator and fine particle dispersion device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circulator saving electric power and sufficiently circulating indoor air. <P>SOLUTION: The circulator includes: a casing 2 having a suction port 5 and blowout ports 4a, 4b, 4c opened thereon; an air blowing path 10 interconnecting the suction port 5 to blowout ports 4a, 4b, 4c and provided within the casing 2; and an air fan 8 arranged in the air blowing path 10 and sending out an air stream to the circumferential direction. The air blowing path 10 includes: a vertical direction expansion part 11 gradually expanding a flow passage to the vertical direction of a rotating shaft of the air fan 8 downstream of the air fan 8; and an axial direction expansion part 12 positioned downstream of the vertical direction expansion part 11, gradually expanding the flow passage to the axial direction of the rotating shaft of the air fan 8 and maintaining at a constant level or gradually contracting the flow passage in the vertical direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a circulator that circulates indoor air. The present invention also relates to a microparticle diffusing apparatus that sends microparticles such as ions and diffuses them into a room.

  A conventional circulator is disclosed in Patent Document 1. This circulator is installed on the floor of the room, and has a suction opening at the bottom and an outlet at the top. By driving a blower fan arranged inside the circulator, indoor air is sucked in along the floor surface from the suction port, and the air is sent out forward and upward from the blower outlet. Thereby, indoor air can be circulated.

  Patent Document 2 discloses a conventional fine particle diffusion device. This fine particle diffusing device is arranged on the top surface of a refrigerator or the like, and a blower fan is provided in a housing having a blower opening at the front. The blower fan is composed of a sirocco fan that sucks in the axial direction and exhausts it in the circumferential direction, and the rotation shaft is arranged vertically. The blower fan and the blower outlet are connected by a blower path. The air blowing path is gradually widened in the left-right direction on the downstream side of the blower fan and is gradually narrowed in the up-down direction. A fine particle generator for generating ions that are fine particles is disposed in the air blowing path.

  The air flow generated by the blower fan flows in the left-right direction through the blower path, and includes fine particles generated by the fine particle generator. The airflow containing the fine particles spreads from the outlet in the left-right direction and is sent out, and the fine particles are diffused into the room. Thereby, positive ions and negative ions can be supplied indoors to sterilize indoor floating bacteria.

Japanese Patent Laid-Open No. 8-270992 (pages 2-5, FIG. 4) Japanese Patent No. 3797993 (pages 4 to 18, FIGS. 1 and 2)

  However, according to the conventional circulator disclosed in Patent Document 1, the air sent out from the air outlet does not sufficiently diffuse in the left-right direction of the room. For this reason, there is a problem that it is difficult to circulate air to every corner of the room. If a swing mechanism for swinging the blower fan in the left-right direction is provided, air can be circulated to every corner of the room, but there is a problem that the cost of the circulator increases because the structure becomes complicated.

  Moreover, according to the conventional microparticle diffusion device disclosed in Patent Document 2, the airflow flowing through the air blowing path is expanded in the left-right direction and sent forward from the outlet. For this reason, it is possible to send air and fine particles over a wide range in the left-right direction of the room with a simple configuration.

  However, since the blower fan has a rotating shaft arranged vertically and exhausts in the circumferential tangential direction, there is a problem that the flow rate of the airflow flowing through the blower path becomes uneven in the left-right direction due to the centrifugal force of the blower fan. Further, since the flow path is narrowed in the vertical direction immediately after the blower fan, the kinetic energy of the airflow cannot be sufficiently collected, and the static pressure in the blower path is lowered. Accordingly, there is a problem that the air current does not reach the wall surface in the room far from the fine particle diffusing apparatus, and the air circulation and the fine particle diffusion cannot be sufficiently performed. On the other hand, if the rotational speed of the blower fan is increased to increase the reach of the airflow, there is a problem that noise and power consumption increase.

  The same problem occurs when fine particles such as fragrances other than ions, deodorants, insecticides, and bactericides are generated by the fine particle generator.

  An object of the present invention is to provide a circulator capable of reducing power consumption and sufficiently circulating indoor air. Another object of the present invention is to provide a microparticle diffusing device that can save power and sufficiently diffuse microparticles in a room.

  To achieve the above object, the present invention provides a housing that opens a suction port and an air outlet, an air passage that is connected to the air inlet and the air outlet, and is provided in the housing, and the air passage. A circulator that is provided with a blower fan that sends out airflow in the circumferential direction and circulates the indoor air by sending out the indoor air flowing into the blower passage from the suction port through the blowout port. A vertical enlargement part that gradually expands the flow path downstream of the blower fan in the vertical direction of the rotation axis of the blower fan, and a flow path in the axial direction of the rotation axis downstream of the vertical expansion part. And an axially enlarged portion that is gradually enlarged and maintained constant in the vertical direction of the rotating shaft or gradually reduced.

  According to this configuration, the blower fan is constituted by a centrifugal fan or a cross-flow fan, and for example, the rotation shaft is arranged horizontally. By driving the blower fan, indoor air flows into the blower path from the suction port and is exhausted in the circumferential direction of the blower fan. The vertical expansion portion on the downstream side of the blower fan is gradually expanded in the vertical direction, recovering the kinetic energy of the airflow and converting it into a static pressure. The axially enlarged portion on the downstream side of the vertically enlarged portion gradually expands in the left-right direction and is constant or reduced in the up-down direction. As a result, the airflow flowing through the axially enlarged portion is expanded in the left-right direction and a decrease in the flow velocity is suppressed. And an air current is sent to the wide range of the left-right direction from a blower outlet, and indoor air circulates. The rotation axis of the blower fan may be arranged inclined with respect to the horizontal, or may be arranged vertically.

  In the circulator having the above-described configuration, it is preferable that the flow path area of the axially enlarged portion is enlarged toward the downstream. According to this configuration, the kinetic energy of the airflow flowing through the axially enlarged portion is recovered and converted to static pressure.

  In the circulator configured as described above, it is preferable that the circulator has a plurality of divided passages that are divided in the axial direction of the rotary shaft in succession to the vertical enlarged portion and the axial enlarged portion. According to this configuration, the airflow flows along the wall surface of the divided passage and is smoothly spread in the axial direction of the rotating shaft.

  According to the present invention, in the circulator having the above-described configuration, the casing is disposed in the vicinity of an indoor ceiling wall with the rotating shaft disposed horizontally, and the outlet is formed at an upper end of the casing. It is more preferable to send the airflow along the ceiling wall. According to this structure, the airflow sent along the indoor ceiling wall from the blower outlet circulates along the ceiling wall by the Coanda effect, and the reach distance of the airflow can be further increased.

  Further, the present invention provides the circulator having the above-described configuration, wherein the casing is disposed in the vicinity of an indoor ceiling wall with the rotation shaft disposed horizontally, and the outlet is formed at a lower portion of the casing. It is more preferable to send the airflow upward from the top. According to this configuration, the airflow sent upward from the air outlet reaches the indoor ceiling wall and circulates along the ceiling wall due to the Coanda effect, so that the reach distance of the airflow can be further increased.

  Further, the present invention provides a housing that opens the suction port and the air outlet, an air passage that is provided in the housing by connecting the air inlet and the air outlet, and is disposed in the air passage in the circumferential direction. A blower fan for sending airflow and a fine particle generator arranged on the downstream side of the blower fan to generate fine particles, and the indoor air flowing into the blower path from the suction port contains fine particles. In the fine particle diffusing device that is sent out from the blower outlet, the blower path has a vertical enlargement part that gradually enlarges the flow path in the direction perpendicular to the rotation axis of the blower fan on the downstream side of the blower fan, and the vertical enlargement And an axially enlarged portion that gradually expands in the axial direction of the rotating shaft and maintains or gradually reduces the flow path in the vertical direction of the rotating shaft.

  According to this configuration, the blower fan is constituted by a centrifugal fan or a cross-flow fan, and for example, the rotation shaft is arranged horizontally. By driving the blower fan, indoor air flows into the blower path from the suction port and is exhausted in the circumferential direction of the blower fan. The vertical expansion portion on the downstream side of the blower fan is gradually expanded in the vertical direction, recovering the kinetic energy of the airflow and converting it into a static pressure. The axially enlarged portion on the downstream side of the vertically enlarged portion gradually expands in the left-right direction and is constant or reduced in the up-down direction. Thereby, the airflow which distribute | circulates an axial direction expansion part is expanded in the left-right direction, and the fall of the flow velocity is suppressed. And the airflow containing the microparticles generated by the microparticle generator is sent from the outlet to a wide range in the left-right direction, and the microparticles diffuse in the room. The rotation axis of the blower fan may be arranged inclined with respect to the horizontal, or may be arranged vertically.

  According to the present invention, in the fine particle diffusing apparatus having the above-described configuration, the fine particles generated by the fine particle generator may include any of ions, fragrances, deodorants, insecticides, and bactericides.

  According to the present invention, the vertical expansion part gradually expands the flow path in the vertical direction of the rotation axis of the blower fan, and the axial expansion part moves the flow path downstream of the vertical expansion part to the axis of the rotation axis of the blower fan. Since it gradually expands in the direction and is kept constant or gradually contracts in the vertical direction, it is possible to prevent uneven flow due to the centrifugal force of the blower fan. In addition, after the kinetic energy of the airflow is sufficiently converted into static pressure by the vertical expansion portion and the static pressure is increased, the airflow is spread in the axial direction by suppressing the speed reduction of the airflow at the axial expansion portion. Thereby, power saving can be achieved and the reach of the airflow can be increased. Therefore, indoor air can be circulated sufficiently. Further, the fine particles can be sufficiently diffused in the room.

The perspective view which looked at the microparticle diffusion apparatus of a 1st embodiment of the present invention from the upper part The perspective view which looked at the microparticle diffusion apparatus of a 1st embodiment of the present invention from the lower part The front view of the microparticle diffusion apparatus of 1st Embodiment of this invention Side surface sectional view of the AA cross section of FIG. Top sectional view of BB section of FIG. The figure which shows the indoor airflow state of the microparticle diffusion apparatus of 1st Embodiment of this invention. Side surface sectional drawing of the microparticle diffusion apparatus of 2nd Embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. 1, 2, and 3 are a perspective view of the microparticle diffusion device of the first embodiment as viewed from above, a perspective view and a front view as viewed from below. The fine particle diffusion device 1 is covered with a housing 2 and is arranged in the vicinity of a corner between one side wall S and a ceiling wall T (see FIG. 4). The housing 2 may be attached to the side wall S, or may be attached to the ceiling wall T in the vicinity of the side wall S.

  A suction port 5 is opened on the lower surface of the housing 2. A filter 6 is disposed at the suction port 5. A first air outlet 4a, a second air outlet 4b, and a third air outlet 4c are juxtaposed in the horizontal direction on the front upper portion of the housing 2 in order from the right toward the room. The 1st blower outlet 4a, the 2nd blower outlet 4b, and the 3rd blower outlet 4c are provided in the upper end of the housing | casing 2, and send out air along the ceiling wall T (refer FIG. 4). As will be described in detail later, the first air outlet 4a sends air from the housing 2 to the right, the second air outlet 4b sends air from the housing 2 to the front, and the third air outlet 4c is the housing. Air is sent from 2 to the left.

  4 and 5 show a side sectional view of the AA section and a top sectional view of the BB section of FIG. Inside the housing 2, a blower path 10 that connects the first air outlet 4 a, the second air outlet 4 b, the third air outlet 4 c, and the suction port 5 is provided. A blower fan 8 is disposed in the blower path 10. The blower fan 8 is composed of a cross flow fan (cross-flow fan) in which rotating blades (not shown) are rotationally driven by a fan motor 8a, and a rotating shaft is arranged in the horizontal direction. By driving the fan motor 8a, the blower fan 8 takes in air from the circumferential direction of the rotor blade (not shown) and exhausts it in the circumferential direction. You may form the ventilation fan 8 with the centrifugal fan which has arrange | positioned the rotating shaft to the horizontal direction.

  A first divided passage 10a, a second divided passage 10b, and a third divided passage 10c that are divided in the horizontal direction on the downstream side of the blower fan 8 are provided in the blower passage 10 in order. The first divided passage 10a, the second divided passage 10b, and the third divided passage 10c have a first outlet 4a, a second outlet 4b, and a third outlet 4c opened at the front ends, respectively. Further, the inner side wall 10e and the outer side wall 10f of the first divided passage 10a and the third divided passage 10c are formed by curved surfaces inclined with respect to the vertical plane.

  In the first divided passage 10a, the second divided passage 10b, and the third divided passage 10c, a vertical expansion portion 11 and an axial expansion portion 12 are formed on the downstream side of the blower fan 8, respectively. The vertical expansion unit 11 gradually expands the flow path in the vertical direction of the rotation axis of the blower fan 8. The axially expanding portion 12 gradually expands the flow path in the axial direction of the rotation axis of the blower fan 8 and gradually decreases in the vertical direction on the downstream side of the vertical expanding portion 11.

  In addition, the flow path area of the axial direction expansion part 12 is expanded so that it becomes downstream. The first divided passage 10 a, the second divided passage 10 b, and the third divided passage 10 c are formed continuously with the vertical direction enlarged portion 11 and the axial direction enlarged portion 12.

  The electrodes 7a and 7b of the fine particle generator 7 are exposed and arranged in the first divided passage 10a, the second divided passage 10b, and the third divided passage 10c. The electrode 7a and the electrode 7b are respectively partitioned by a partition wall 10d in the first divided passage 10a, the second divided passage 10b, and the third divided passage 10c.

A voltage having an AC waveform or an impulse waveform is applied to the electrodes 7a and 7b. A positive voltage is applied to the electrode 7a, and ions generated by ionization combine with moisture in the air to form positive cluster ions mainly composed of H ⁺ (H ₂ O) m. A negative voltage is applied to the electrode 7b, and ions generated by ionization combine with moisture in the air to form negatively clustered ions mainly composed of O ₂ ⁻ (H ₂ O) n. Here, m and n are arbitrary natural numbers.

H ⁺ (H ₂ O) m and O ₂ ⁻ (H ₂ O) n aggregate on the surface of airborne bacteria and odorous components and surround them. Then, as shown in the formulas (1) to (3), [.OH] (hydroxyl radical) and H ₂ O ₂ (hydrogen peroxide) which are active species are collided on the surface of floating bacteria, odorous components, etc. Aggregate to break them. Here, m ′ and n ′ are arbitrary natural numbers. Therefore, indoor sterilization and odor removal can be performed by generating positive ions and negative ions and discharging them from the first air outlet 4a, the second air outlet 4b, and the third air outlet 4c.

H ⁺ (H ₂ O) m + O ₂ ⁻ (H ₂ O) n → OH + 1 / 2O ₂ + (m + n) H ₂ O (1)
_{^{H + (H 2 O) m}} + H + (H 2 O) m '+ O 2 - (H 2 O) n + O 2 - (H 2 O) n'
→ 2 OH + O ₂ + (m + m ′ + n + n ′) H ₂ O (2)
_{^{H + (H 2 O) m}} + H + (H 2 O) m '+ O 2 - (H 2 O) n + O 2 - (H 2 O) n'
→ H ₂ O ₂ + O ₂ + (m + m ′ + n + n ′) H ₂ O (3)

  In the fine particle diffusing device 1 having the above configuration, when the blower fan 8 and the fine particle generator 7 are driven, indoor air is taken into the housing 2 from the suction port 5. The air taken into the housing 2 is collected by the filter 6 and flows through the air blowing path 10 and is guided to the air blowing fan 8.

  The exhaust air from the blower fan 8 is branched into a first divided passage 10a, a second divided passage 10b, and a third divided passage 10c, and is led to the first outlet 4a, the second outlet 4b, and the third outlet 4c, respectively. At this time, if the rotation axis of the blower fan 8 is arranged vertically, the air flow becomes uneven in the left-right direction due to centrifugal force. For this reason, the rotational axis of the blower fan 8 can be horizontally arranged to make the airflow in the left-right direction uniform. In addition, since the inner side wall 10e of the first divided passage 10a and the third divided passage 10c is inclined with respect to the vertical plane, the airflow straightly traveling in the circumferential tangential direction from the blower fan 8 can be easily curved.

  In addition, the flow path is expanded in the vertical direction by the vertical expansion portion 11 and the flow path is expanded in the horizontal direction by the axial expansion portion 12. In the vertical expansion section 11 upstream of the axial expansion section 12, the influence of the centrifugal force of the blower fan 8 exhausted in the circumferential direction is large. For this reason, since the airflow proceeds in a direction perpendicular to the rotation axis of the blower fan 8, it is not desirable to spread it to the left and right. Then, the kinetic energy of the airflow is recovered and converted into a static pressure by expanding the flow path in the vertical direction by the vertical expansion unit 11, and the static pressure is increased. Thereby, the ventilation capability of the microparticle diffusion apparatus 1 can be improved. In addition, the width in the left-right direction of the flow path may be made constant by the vertical enlargement unit 11 or may be slightly reduced. At this time, the flow path area is gradually expanded toward the downstream.

  Since the axial direction expansion portion 12 expands the flow path in the left-right direction with the centrifugal force by the blower fan 8 weakened, the airflow can be smoothly curved and expanded in the left-right direction without increasing the pressure loss. Moreover, since the flow path is restricted in the vertical direction, the airflow can be more smoothly spread in the left-right direction, and the speed reduction of the airflow can be suppressed. At this time, since the flow path area of the axially expanded portion 12 increases as it becomes downstream, the kinetic energy can also be recovered and converted into static pressure in the axially expanded portion 12 to increase the static pressure.

  The air flow flowing through the first divided passage 10a, the second divided passage 10b, and the third divided passage 10c includes positive ions and negative ions by the microparticle generator 7. Thereby, the airflow containing a positive ion and a negative ion is sent out from the 1st blower outlet 4a, the 2nd blower outlet 4b, and the 3rd blower outlet 4c.

  FIG. 6 shows the state of the airflow in the room D sent out from the microparticle diffusion device 1. The first airflow A1 sent to the right from the first outlet 4a flows along the ceiling wall T and descends along the right side wall (first wall surface P1). The second airflow A2 sent forward from the second outlet 4b flows along the ceiling wall T and along the side wall (second wall surface P2) facing the side wall S on which the microparticle diffusion device 1 is arranged. Descent. The third airflow A3 sent to the left from the third outlet 4c flows along the ceiling wall T and descends along the left side wall (third wall surface P3).

  The airflow descending the first wall surface P1, the second wall surface P2, and the third wall surface P3 flows through the indoor floor surface F, rises along the side wall S, and returns to the suction port 5 of the microparticle diffusion device 1. Thereby, airflow circulates along each wall surface in a room, and it can spread ions to every corner of a room. In addition, ions gradually diffuse into the living space in the center of the room due to the airflow flowing along the wall surface. Since the first, second, and third airflows A1, A2, and A3 travel along the wall surface due to the Coanda effect, kinetic energy taken away by indoor air is suppressed. Thereby, power consumption can be suppressed and the reach | attainment distance of an airflow can be enlarged.

  The polarity of ions generated by the electrodes 7a and 7b may be switched every predetermined period. That is, positive ions are generated from the electrode 7a and negative ions are generated from the electrode 7b. When a predetermined period elapses, negative ions are generated from the electrode 7a and positive ions are generated from the electrode 7b. When a predetermined time further elapses, positive ions are generated from the electrode 7a and negative ions are generated from the electrode 7b, and this operation is repeated.

  As a result, positive ions and negative ions are alternately sent to the left end and the right end of the air flow that spreads in the left and right directions through the first divided passage 10a, the second divided passage 10b, and the third divided passage 10c. Therefore, positive ions and negative ions can be distributed at a high concentration over a wide range in the left-right direction in the room.

  According to the present embodiment, the vertical expansion unit 11 gradually expands the flow path in the direction perpendicular to the rotation axis of the blower fan 8, and the axial expansion unit 12 flows the flow path downstream of the vertical expansion unit 11. 8 gradually expands in the axial direction of the rotary shaft and gradually decreases in the vertical direction. Thereby, the non-uniformity of the flow rate due to the centrifugal force of the blower fan 8 can be prevented, and the airflow can be spread in the axial direction of the rotation shaft of the blower fan 8.

  In addition, since the flow passage area cannot be reduced by the vertically enlarged portion 11 immediately after the blower fan 8, the kinetic energy of the airflow is sufficiently recovered to increase the static pressure. Then, the axial direction expansion part 12 suppresses the speed reduction of the air current, and the air current is expanded in the axial direction. Thereby, the reach distance of the airflow can be increased without increasing the rotational speed of the blower fan 8. Therefore, power saving and noise reduction of the fine particle diffusion device 1 can be achieved, and ions can be sufficiently diffused into the room.

  In addition, in the vertical expansion part 11, the influence of the centrifugal force of the blower fan 8 is large, and even if the width in the left-right direction of the flow path is gradually widened, not only the effect of spreading the airflow to the left and right is reduced, but rather the performance of the blower fan 8. May be reduced. For this reason, the width in the left-right direction of the flow path may be kept constant by the vertical enlargement unit 11 or may be slightly reduced. Moreover, you may maintain the width | variety of the up-down direction of a flow path with the axial direction expansion part 12 constant.

  Moreover, since the flow path area of the axial direction expansion part 12 expands as it becomes downstream, also in the axial direction expansion part 12, kinetic energy can be collect | recovered and converted into a static pressure, and a static pressure can be raised more. The flow path area may be kept constant by the axially enlarged portion 12. At this time, the recovery of the kinetic energy in the axial expansion portion 12 is reduced, but the static pressure can be increased more than in the conventional case by the recovery of the kinetic energy in the vertical expansion portion 11.

  Moreover, since it has a plurality of first divided passages 10a, second divided passages 10b, and third divided passages 10c that are divided in the axial direction of the blower fan 8 continuously from the vertical direction enlarged portion 11 and the axial direction enlarged portion 12, The airflow can flow along the wall surfaces of the first divided passage 10a, the second divided passage 10b, and the third divided passage 10c, and the airflow can be smoothly spread in the axial direction of the blower fan 8.

  Further, the rotation axis of the blower fan 8 is horizontally arranged, the casing 2 is arranged in the vicinity of the ceiling wall T in the room, and the first outlet 4a, the second outlet 4b, and the third outlet 4c are connected to the casing 2. The airflow is sent out along the ceiling wall T. Thereby, the airflow sent out along the ceiling wall T distribute | circulates along the ceiling wall T by the Coanda effect. Therefore, the reach distance of the air current can be made longer.

  Next, FIG. 7 shows a side sectional view of the microparticle diffusion device of the second embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those in the first embodiment shown in FIGS. In the present embodiment, the first air outlet 4 a, the second air outlet 4 b, and the third air outlet 4 c that are horizontally arranged in the same manner as in the first embodiment open in the lower front surface of the housing 2. Further, the suction port 5 opens on the upper surface of the housing 2. Other parts are the same as those in the first embodiment.

  The housing 2 of the microparticle diffusion device 1 is attached to one side wall S of the room with a predetermined gap H between the ceiling wall T and the casing 2. The first divided passage 10a, the second divided passage 10b, and the third divided passage 10c (see FIG. 4) are inclined upward by a predetermined angle with respect to the horizontal. Thereby, after the first airflow A1, the second airflow A2, and the third airflow A3 reach the ceiling wall T, they circulate along the ceiling wall T.

  The first airflow A1 sent to the right from the first outlet 4a flows along the ceiling wall T and descends along the right side wall (first wall surface P1 (see FIG. 6)). The second airflow A2 sent forward from the second outlet 4b flows along the ceiling wall T and faces the side wall S on which the microparticle diffusion device 1 is disposed (second wall surface P2 (FIG. 6). D) Follow d). The third airflow A3 sent to the left from the third outlet 4c flows along the ceiling wall T and descends along the left side wall (third wall surface P3 (see FIG. 6)). The airflow descending the first wall surface P1, the second wall surface P2, and the third wall surface P3 flows through the floor F in the room, rises along the side wall S, and the suction port 5 from the side of the microparticle diffusion device 1. Return to.

  According to the present embodiment, as in the first embodiment, the vertical expansion unit 11 gradually expands the flow path in the vertical direction of the rotation axis of the blower fan 8, and the axial expansion unit 12 is the vertical expansion unit 11. On the downstream side, the flow path is gradually expanded in the axial direction of the rotation axis of the blower fan 8 and gradually reduced in the vertical direction, so that non-uniform flow rate due to the centrifugal force of the blower fan 8 is prevented and the blower fan 8 is rotated. Airflow can be spread in the axial direction of the shaft.

  In addition, since the flow passage area cannot be reduced by the vertically enlarged portion 11 immediately after the blower fan 8, the kinetic energy of the airflow is sufficiently recovered to increase the static pressure. Then, the axial direction expansion part 12 suppresses the speed reduction of the air current, and the air current is expanded in the axial direction. Thereby, the reach distance of the airflow can be increased without increasing the rotational speed of the blower fan 8. Therefore, power saving and noise reduction of the fine particle diffusion device 1 can be achieved, and ions can be sufficiently diffused into the room.

  Further, the rotation axis of the blower fan 8 is horizontally arranged, the casing 2 is arranged in the vicinity of the ceiling wall T in the room, and the first outlet 4a, the second outlet 4b, and the third outlet 4c are connected to the casing 2. It is formed in the lower part of the air and airflow is sent upward. Thereby, the airflow sent out upward from the 1st blower outlet 4a, the 2nd blower outlet 4b, and the 3rd blower outlet 4c reaches | attains the indoor ceiling wall T, and distribute | circulates along the ceiling wall T by the Coanda effect. Therefore, the reach distance of the air current can be made longer.

  The fine particle diffusing device 1 of the first embodiment may be attached to the side wall S with a predetermined gap H from the ceiling wall T. Then, similarly to the present embodiment, the first divided passage 10a, the second divided passage 10b, and the third divided passage 10c are inclined upward by a predetermined angle with respect to the horizontal. Accordingly, the first airflow A1, the second airflow A2, and the third airflow A3 can be distributed along the ceiling wall T after reaching the ceiling wall T. However, since the kinetic energy is deprived before the first airflow A1, the second airflow A2, and the third airflow A3 reach the ceiling wall T, the first air outlet 4a along the ceiling wall T as in the first embodiment. It is more desirable to form the second air outlet 4b and the third air outlet 4c.

  In the first and second embodiments, the microparticle diffusion device 1 sends out positive ions and negative ions generated by the microparticle generator 7 to sterilize the room. The fine particle diffusion device 1 that generates only negative ions by the fine particle generator 7 and obtains an indoor relaxation effect may be used. Alternatively, the fine particle diffusing device 1 that generates a fragrance, a deodorant, an insecticide, a bactericidal agent, or the like by the fine particle generator 7 and performs indoor deodorization, insecticide, sterilization, or the like may be used.

  Further, the fine particle generator 7 may be omitted, and a circulator that circulates the airflow in the room by the first, second, and third airflows A1, A2, and A3. At this time, the kinetic energy of the airflow is recovered by the vertical expansion unit 11 and converted into static pressure, and then the airflow is expanded in the left-right direction by the axial expansion unit 12 to increase the reach distance of the airflow. Therefore, power saving and noise reduction can be achieved, and indoor air can be circulated sufficiently.

  Moreover, although the rotating shaft of the ventilation fan 8 is arrange | positioned horizontally, you may distribute | tilt with respect to the horizontal and may arrange | position vertically. And the effect similar to the above can be acquired by arranging the 1st blower outlet 4a, the 2nd blower outlet 4b, and the 3rd blower outlet 4c in parallel with the axial direction of the ventilation fan 8. FIG.

  The present invention can be used for a circulator that circulates indoor air. Moreover, according to this invention, it can utilize for the microparticle spreading | diffusion apparatus which sends out microparticles, such as an ion, a fragrance | flavor, a deodorant, an insecticide, and a disinfectant, and diffuses it indoors.

DESCRIPTION OF SYMBOLS 1 Fine particle diffusion apparatus 2 Housing | casing 4a 1st blower outlet 4b 2nd blower outlet 4c 3rd blower outlet 4d 4th blower outlet 5 Suction inlet 6 Filter 7 Fine particle generator 8 Blower fan 10 Blower path 10a 1st division | segmentation path 10b Second division passage 10c Third division passage 11 Vertical expansion portion 12 Axial expansion portion A1 First airflow A2 Second airflow A3 Third airflow A4 Fourth airflow F Floor surface P1 First wall surface P2 Second wall surface P3 Third wall surface S side wall T ceiling wall

Claims (7)

  A housing that opens the suction port and the air outlet, an air passage that is connected to the air inlet and the air outlet, and is provided in the housing, and an air that is arranged in the air passage and sends out an airflow in the circumferential direction A circulator that circulates indoor air by sending indoor air flowing into the air flow path from the inlet through the air outlet, and the air flow path is a flow path downstream of the air blower fan. A vertical expansion portion that gradually expands in the vertical direction of the rotation axis of the blower fan, and a flow path that gradually expands in the axial direction of the rotation shaft on the downstream side of the vertical expansion portion and that in the vertical direction of the rotation shaft A circulator having an axially enlarged portion that is maintained constant or gradually reduced.   The circulator according to claim 1, wherein the flow path area of the axially enlarged portion is enlarged as it goes downstream.   3. The circulator according to claim 1, further comprising a plurality of divided passages that are divided in the axial direction of the rotating shaft in succession to the vertical direction enlarged portion and the axial direction enlarged portion.   The casing is arranged in the vicinity of an indoor ceiling wall with the rotating shaft arranged horizontally, the outlet is formed at the upper end of the casing, and an air flow is sent from the outlet along the ceiling wall. The circulator according to any one of claims 1 to 3, wherein:   The casing is disposed in the vicinity of an indoor ceiling wall with the rotating shaft horizontally, and the air outlet is formed in the lower part of the casing and airflow is sent upward from the air outlet. The circulator according to any one of claims 1 to 3.   A housing that opens the suction port and the air outlet, an air passage that is connected to the air inlet and the air outlet, and is provided in the housing, and an air that is arranged in the air passage and sends out an airflow in the circumferential direction A fan and a fine particle generator arranged on the downstream side of the blower fan to generate fine particles, and the fine air contained in the indoor air flowing into the blower passage from the suction port is sent out from the outlet In the fine particle diffusing apparatus, the air flow path is formed on the downstream side of the blower fan, and the flow passage is gradually enlarged in the vertical direction of the rotation axis of the blower fan, and on the downstream side of the vertical enlargement unit. A fine particle diffusing apparatus, comprising: an axially expanding portion that gradually expands the flow path in the axial direction of the rotating shaft and maintains constant in the vertical direction of the rotating shaft or gradually decreases.   The fine particle diffusing device according to claim 7, wherein the fine particles generated by the fine particle generator include any one of ions, fragrances, deodorants, insecticides, and bactericides.

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